DM6210 Datasheet, PDF (19/91 Pages) List of Unclassifed Manufacturers – dataModule medium speed analog input module

JS3, JS4, JS5 and JS6, Pull-up/Pull-down Resistors on Digital I/O Lines
The DM6210 has 16 TTL/CMOS compatible digital I/O lines which can be interfaced with external
devices. These lines are divided into four groups: Port 0 low (P0.0 - P0.3), Port 0 high (P0.4 - P0.7), Port 1 low
(P1.0 - P1.3) and Port 1 high (P1.3 - P1.7) each with 4 digital I/O lines that can be set as input or output.
Resistors are connected to these lines and can be configured as either pull-up or pull-down resistors.
10 k ohm pull-up/pull-down resistors are installed on the module, and a solder connection must be made
on the bottom of the board to configure their operation. The solder connections are made at JS3 for Port 0 low,
JS4 for Port 0 high, JS5 for Port 1 low and JS6 for Port 1 high. The factory default is pull-up for all ports. This
is done by placing a solder short between the middle (common) pad and V (+5 volts). To configure the
resistors as pull-down resistors, remove the existing solder connection and make one between the middle
(common) pad and G (ground). To disable the pull-up/pull-down resistor, remove the solder connection.
WARNING: Do not install a connection between all three pads as this will damage the board!!
Solder Connections
Fig. 1-6—Pull-up/Pull-down Resistors for the Digital I/O
1-7